{"product_id":"marathon-triple-calendar-moonphase-693","title":"Marathon Triple Calendar Moonphase Automatic, Bidynator Cal. 693","description":"\u003cdiv class=\"watch-description\" style=\"max-width: 900px; padding: 20px; border: 1px solid #ddd; border-radius: 8px; box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.1);\"\u003e\n\u003cp\u003eOffered here is a \u003cstrong\u003evintage Marathon Triple Calendar Moonphase\u003c\/strong\u003e wristwatch, powered by the historically significant \u003cstrong\u003eBidynator automatic\u003c\/strong\u003e movement. Best placed in the \u003cstrong\u003e1940s–1950s\u003c\/strong\u003e (approximate).\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eVintage Marathon Triple Calendar Moonphase Automatic\u003c\/h2\u003e\n\u003cp\u003eMarathon was a Swiss brand known for producing robust, practical watches while often relying on proven Swiss ébauches and respected movement makers. This watch is fitted with the \u003cstrong\u003eBidynator Cal. 693\u003c\/strong\u003e—an early automatic caliber notable for its \u003cstrong\u003ebi-directional winding\u003c\/strong\u003e capability, allowing the rotor to wind the mainspring in both directions of rotation.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eClassic Triple Calendar \u0026amp; Moonphase Layout\u003c\/h2\u003e\n\u003cp\u003eThe configuration is classic and highly collectible: \u003cstrong\u003eday and month apertures\u003c\/strong\u003e, a \u003cstrong\u003ecentral pointer date\u003c\/strong\u003e, and a \u003cstrong\u003emoonphase display at 6 o’clock\u003c\/strong\u003e. The watch is currently \u003cstrong\u003erunning well\u003c\/strong\u003e; the automatic system is active, \u003cstrong\u003emanual winding via the crown\u003c\/strong\u003e is functional, and the calendar \/ moonphase indications operate correctly.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width: 80%; margin: 20px auto; border-collapse: collapse; border-radius: 10px; overflow: hidden;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eBRAND\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eMarathon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eMODEL\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eTriple Calendar Moonphase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eERA\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eCirca 1940s–1950s (approximate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eMOVEMENT\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eBidynator Cal. 693, Swiss automatic, bi-directional winding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eMANUAL WINDING\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eYes (via crown)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eFUNCTIONS\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eHours, minutes, central seconds, day, pointer date, month, moonphase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eCASE\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eGold-plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eCASE DIAMETER\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003e31 mm (excluding crown \u0026amp; pushers)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eMEASURED WIDTH\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eApprox. 34 mm (including crown \u0026amp; pushers)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eWRIST PRESENCE\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eWears closer to ~36–37 mm due to case profile and calendar pushers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eLUG WIDTH\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003e16 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eCRYSTAL\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eAcrylic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eSTRAP\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eBlack leather strap (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; background-color: #e0e0e0;\"\u003eACCESSORIES\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; background-color: #f9f9f9;\"\u003eWatch only (no box, no papers)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"text-align: center;\"\u003eCondition \u0026amp; Important Remarks\u003c\/h2\u003e\n\u003cul style=\"margin: 10px 0; padding-left: 20px;\"\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003eDial:\u003c\/strong\u003e Original dial with heavy, even patina throughout. Visible spotting, discoloration, and surface wear consistent with age. Calendar and moonphase indications remain legible. Dial appears \u003cstrong\u003enot refinished\u003c\/strong\u003e to the best of the visible evidence.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003eHands:\u003c\/strong\u003e Original hands with oxidation and age-related wear. Red central seconds hand shows visible aging.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003eCase:\u003c\/strong\u003e Gold-plated case showing notable wear, scratches, and areas of plating loss, especially on lugs and edges. Crown and pushers show surface wear consistent with decades of use.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Acrylic crystal with visible surface scratches and marks; no cracks observed.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px;\"\u003e\n\u003cstrong\u003eMovement \/ Functions:\u003c\/strong\u003e Bidynator Cal. 693 automatic. Reported as currently running; automatic winding active; manual winding functional; calendar and moonphase functions reported to operate correctly. \u003cstrong\u003eService history is unknown.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0;\"\u003e\n\u003cstrong\u003eWater resistance:\u003c\/strong\u003e Not tested. As a vintage watch with calendar pushers, \u003cstrong\u003ewater resistance should not be assumed\u003c\/strong\u003e. A pressure test is strongly recommended before any exposure to moisture; avoid immersion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eImportant Notice\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eNo affiliation with the brand. Sold as-is. Condition is exactly as shown in the photos. Timekeeping may vary due to age; a service is always recommended for optimal accuracy. Water resistance is not confirmed—please have the watch pressure-tested before any contact with water. Feel free to reach out with any questions or refer to the photos for details.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"WatchGents.com","offers":[{"title":"Default Title","offer_id":46346603167929,"sku":null,"price":1000.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0526\/9795\/6537\/files\/B5942B80-F0F7-41C6-9587-2D710FE9ED4A.jpg?v=1775268646","url":"https:\/\/watchgent.com\/products\/marathon-triple-calendar-moonphase-693","provider":"watchgents.com","version":"1.0","type":"link"}